Error -3 while decompressing data: incorrect header check

I have .zip file which contain csv data. I am reading .zip file using

<input type = "file" name = "select_file"/>

I want to decompress that .zip file and read csv data.

file_data = self.request.get('select_file')
file_str = zlib.decompress(file_data)  

#file_data_list = file_str.split('\n')
#file_Reader = csv.reader(file_data_list,quoting=csv.QUOTE_NONE )

I am expecting csv data in file_str but I am getting error.

error :: Error -3 while decompressing data: incorrect header check

What I have to use?

Try making a zipfile.ZipFile object instead -- as the first argument, you need an open file-like object, so first make one out of your file_data bytes with cStringIO.